jest/no-export Correctness ​
What it does ​
Prevents using exports if a file has one or more tests in it.
Why is this bad? ​
This rule aims to eliminate duplicate runs of tests by exporting things from test files. If you import from a test file, then all the tests in that file will be run in each imported instance. so bottom line, don't export from a test, but instead move helper functions into a separate file when they need to be shared across tests.
Example ​
javascript
export function myHelper() {}
describe("a test", () => {
expect(1).toBe(1);
});